Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation
We present a Rare Earth Elements (REE) record determined on the EPICA ice core drilled at Dronning Maud Land (EDML) in the Atlantic sector of the East Antarctic Plateau. The record covers the transition from the last glacial stage (LGS) to the early Holocene (26 600-7500 yr BP) at decadal to centenn...
Published in: | Climate of the Past |
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Online Access: | http://hdl.handle.net/1885/52158 https://doi.org/10.5194/cp-8-135-2012 https://openresearch-repository.anu.edu.au/bitstream/1885/52158/5/Change_in_dust_variability_Wegner_DeDeckker_etal_ClimPastDisc_2012.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/52158/7/01_Wegner_Change_in_dust_variability_in_2012.pdf.jpg |
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/52158 2024-01-14T10:00:43+01:00 Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation Wegner, Anna Gabrielli, P. Wilhelms-Dick, D. Ruth, U. Kriews, Michael De Deckker, Patrick Barbante, C. Cozzi, G. Delmonte, B. Fischer, H. http://hdl.handle.net/1885/52158 https://doi.org/10.5194/cp-8-135-2012 https://openresearch-repository.anu.edu.au/bitstream/1885/52158/5/Change_in_dust_variability_Wegner_DeDeckker_etal_ClimPastDisc_2012.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/52158/7/01_Wegner_Change_in_dust_variability_in_2012.pdf.jpg unknown Copernicus GmbH 1814-9340 http://hdl.handle.net/1885/52158 doi:10.5194/cp-8-135-2012 https://openresearch-repository.anu.edu.au/bitstream/1885/52158/5/Change_in_dust_variability_Wegner_DeDeckker_etal_ClimPastDisc_2012.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/52158/7/01_Wegner_Change_in_dust_variability_in_2012.pdf.jpg Climate of the Past Discussions Keywords: atmospheric circulation dome dust Holocene ice core Last Glacial paleoclimate rare earth element sampling Southern Hemisphere Antarctic Plateau Antarctica Australia East Antarctica New Zealand Queen Maud Land Journal article ftanucanberra https://doi.org/10.5194/cp-8-135-2012 2023-12-15T09:33:54Z We present a Rare Earth Elements (REE) record determined on the EPICA ice core drilled at Dronning Maud Land (EDML) in the Atlantic sector of the East Antarctic Plateau. The record covers the transition from the last glacial stage (LGS) to the early Holocene (26 600-7500 yr BP) at decadal to centennial resolution. Additionally, samples from potential source areas (PSAs) for Antarctic dust were analyzed for their REE characteristics. The dust provenance is discussed by comparing the REE fingerprints in the ice core and the PSA samples. We find a shift in variability in REE composition at ∼15 000 yr BP in the ice core samples. Before 15 000 yr BP, the dust composition is very uniform and its provenance was most certainly dominated by a South American source. After 15 000 yr BP, multiple sources such as Australia and New Zealand become relatively more important, although South America remains the major dust source. A similar change in the dust characteristics was observed in the EPICA Dome C ice core at around ∼15 000 yr BP, accompanied by a shift in the REE composition, thus suggesting a change of atmospheric circulation in the Southern Hemisphere. Article in Journal/Newspaper Antarc* Antarctic Antarctica Antarctica New Zealand Dronning Maud Land East Antarctica EPICA ice core Queen Maud Land Australian National University: ANU Digital Collections Antarctic East Antarctica Dronning Maud Land New Zealand Queen Maud Land ENVELOPE(12.000,12.000,-72.500,-72.500) Climate of the Past 8 1 135 147 |
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Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: atmospheric circulation dome dust Holocene ice core Last Glacial paleoclimate rare earth element sampling Southern Hemisphere Antarctic Plateau Antarctica Australia East Antarctica New Zealand Queen Maud Land |
spellingShingle |
Keywords: atmospheric circulation dome dust Holocene ice core Last Glacial paleoclimate rare earth element sampling Southern Hemisphere Antarctic Plateau Antarctica Australia East Antarctica New Zealand Queen Maud Land Wegner, Anna Gabrielli, P. Wilhelms-Dick, D. Ruth, U. Kriews, Michael De Deckker, Patrick Barbante, C. Cozzi, G. Delmonte, B. Fischer, H. Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation |
topic_facet |
Keywords: atmospheric circulation dome dust Holocene ice core Last Glacial paleoclimate rare earth element sampling Southern Hemisphere Antarctic Plateau Antarctica Australia East Antarctica New Zealand Queen Maud Land |
description |
We present a Rare Earth Elements (REE) record determined on the EPICA ice core drilled at Dronning Maud Land (EDML) in the Atlantic sector of the East Antarctic Plateau. The record covers the transition from the last glacial stage (LGS) to the early Holocene (26 600-7500 yr BP) at decadal to centennial resolution. Additionally, samples from potential source areas (PSAs) for Antarctic dust were analyzed for their REE characteristics. The dust provenance is discussed by comparing the REE fingerprints in the ice core and the PSA samples. We find a shift in variability in REE composition at ∼15 000 yr BP in the ice core samples. Before 15 000 yr BP, the dust composition is very uniform and its provenance was most certainly dominated by a South American source. After 15 000 yr BP, multiple sources such as Australia and New Zealand become relatively more important, although South America remains the major dust source. A similar change in the dust characteristics was observed in the EPICA Dome C ice core at around ∼15 000 yr BP, accompanied by a shift in the REE composition, thus suggesting a change of atmospheric circulation in the Southern Hemisphere. |
format |
Article in Journal/Newspaper |
author |
Wegner, Anna Gabrielli, P. Wilhelms-Dick, D. Ruth, U. Kriews, Michael De Deckker, Patrick Barbante, C. Cozzi, G. Delmonte, B. Fischer, H. |
author_facet |
Wegner, Anna Gabrielli, P. Wilhelms-Dick, D. Ruth, U. Kriews, Michael De Deckker, Patrick Barbante, C. Cozzi, G. Delmonte, B. Fischer, H. |
author_sort |
Wegner, Anna |
title |
Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation |
title_short |
Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation |
title_full |
Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation |
title_fullStr |
Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation |
title_full_unstemmed |
Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation |
title_sort |
change in dust variability in the atlantic sector of antarctica at the end of the last deglaciation |
publisher |
Copernicus GmbH |
url |
http://hdl.handle.net/1885/52158 https://doi.org/10.5194/cp-8-135-2012 https://openresearch-repository.anu.edu.au/bitstream/1885/52158/5/Change_in_dust_variability_Wegner_DeDeckker_etal_ClimPastDisc_2012.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/52158/7/01_Wegner_Change_in_dust_variability_in_2012.pdf.jpg |
long_lat |
ENVELOPE(12.000,12.000,-72.500,-72.500) |
geographic |
Antarctic East Antarctica Dronning Maud Land New Zealand Queen Maud Land |
geographic_facet |
Antarctic East Antarctica Dronning Maud Land New Zealand Queen Maud Land |
genre |
Antarc* Antarctic Antarctica Antarctica New Zealand Dronning Maud Land East Antarctica EPICA ice core Queen Maud Land |
genre_facet |
Antarc* Antarctic Antarctica Antarctica New Zealand Dronning Maud Land East Antarctica EPICA ice core Queen Maud Land |
op_source |
Climate of the Past Discussions |
op_relation |
1814-9340 http://hdl.handle.net/1885/52158 doi:10.5194/cp-8-135-2012 https://openresearch-repository.anu.edu.au/bitstream/1885/52158/5/Change_in_dust_variability_Wegner_DeDeckker_etal_ClimPastDisc_2012.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/52158/7/01_Wegner_Change_in_dust_variability_in_2012.pdf.jpg |
op_doi |
https://doi.org/10.5194/cp-8-135-2012 |
container_title |
Climate of the Past |
container_volume |
8 |
container_issue |
1 |
container_start_page |
135 |
op_container_end_page |
147 |
_version_ |
1788066597230870528 |